My two favourite musical discoveries this year have been Tuba Skinny and Caro Emerald.
Tuba Skinny plays generally lesser-known traditional jazz and blues from New Orleans. Wonderful lively stuff, they are led by cornet & piano player Shaye Cohn (granddaughter of Al Cohn), and perform on the streets for a walk-by audience. Vocals by Erika Lewis are just perfectly pitched. Hear a bunch of their stuff here.
Caro Emerald is a gloriously versatile singer from Holland who revels in jazz, pop, and swing. Her style can be gathered from A Night Like This and Paris. She has been on the scene for a decade and I am amazed that I missed falling for her before.